diff --git a/compiler/test/fail_compilation/fail18243.d b/compiler/test/fail_compilation/fail18243.d
index 0ebaa6afd4..016fff9fce 100644
--- a/compiler/test/fail_compilation/fail18243.d
+++ b/compiler/test/fail_compilation/fail18243.d
@@ -1,10 +1,10 @@
 /*
-EXTRA_FILES: imports/a18243.d
+EXTRA_FILES: imports/a18243.d imports/b18243.d
 TEST_OUTPUT:
 ---
 fail_compilation/fail18243.d(17): Error: none of the overloads of `isNaN` are callable using argument types `!()(float)`
-/home/nick/git/dmd/compiler/test/../../../phobos/std/math/traits.d(31):        Candidates are: `isNaN(X)(X x)`
-fail_compilation/imports/a18243.d(5):                        `a18243.isNaN()`
+fail_compilation/imports/b18243.d(3):        Candidates are: `isNaN(T)(T x)`
+fail_compilation/imports/a18243.d(5):                        `imports.a18243.isNaN()`
 ---
 */
 
diff --git a/compiler/test/fail_compilation/imports/a18243.d b/compiler/test/fail_compilation/imports/a18243.d
index 73df7511ce..35da731b44 100644
--- a/compiler/test/fail_compilation/imports/a18243.d
+++ b/compiler/test/fail_compilation/imports/a18243.d
@@ -1,5 +1,5 @@
-module a18243;
+module imports.a18243;
 
-import std.math : isNaN;
+import imports.b18243 : isNaN;
 
 public bool isNaN() { return false; }
diff --git a/compiler/test/fail_compilation/imports/b18243.d b/compiler/test/fail_compilation/imports/b18243.d
new file mode 100644
index 0000000000..d59128f1f3
--- /dev/null
+++ b/compiler/test/fail_compilation/imports/b18243.d
@@ -0,0 +1,3 @@
+module imports.b18243;
+
+bool isNaN(T)(T x) { return false; }